Sewing-machine looper-movement.



L. nND'izRDoNK.

SEWING MAGHINB LOOPER MOVEMENT. APPLEOATIN FILED NOV,9,1901.

926,891. l Patented July 6,1909;

SHEETS-SHEET 1.

m 00W@ y Y To all whom it may concern.'

UNITED srA'rns A rA'rENT`` oFFIcE.

i,ANsINo oNnenni'iNk, or New YORK, N. Y., AssIGNoR 'ro UNi'oN SPECIAL SEWING MACHINE ce., or rnioiridiLLiNois, A conroRAfrioN or ILLINOIS. fl SEWING-MACHINE LOOPERMOVEMENT.

l *Specification of .Letters Patet Patented Jury e, 190e.v j

4Application filed November 9, 1901. i Serial No. 81,7652.'

Be it known that I, LANSING ONnnRnoNK., :i citizen of the lUnited States, residing at New York, in the county of New York, State of N ew York, have invented certain new and useful Improvements in Sewing-Machine Loopeil\ioveiiients, of which the following. is s' description, 4reference being had to. the accompanying drawing and to the letters and figures ofni'eferencc marked thereon.

My invention relates to an improvement in sewing machines, and especially to a looper.

mechanism therefor.

As herein shown, the invention has been especially intended to provide 'a looper mechanism for blind stitch sewing machines of the type substantially as j shown 'in Patent N o. 2l,077-`-granted Feb. 17, 1903, and shown also in an application iiled by me on the 31st dayol Decen'iber, 190].,Serial No. 87,959 but it will be understood that this looper mechanism and the inanncrof operating the seine maybe applied to machines other than of the type aforesaid.

rl`he invention consists primarily of :i sewing inachi ne looper, cooperating with a needle arranged in a plane reciprocating snbstan tiiilly :it right :ingles thereto, said louper bc- 'ingl supported upon :i rod l'lilcruined in a universal joint, with means for raisingy end lowering said looper, and imparting toit a lateral movement as it rises and falls, and

j having :riso means for bodily oscillating the saine in the direction ol the length of thc loo ier.

i gein, thc invention consists in a loopcr mechanism for blind stitch machines, cornprising n looper arranged and operating entirely abo ve the work support, in combination with a needle reciprocating across the line of the senin' also o )cretino above the work support'. said looper being mounted upon a universal joint upon which it rocks as it rises and falls, with means also for bodily swinging said universal joint whereby the loo er is .also swung bodily.

gain, the invention consists in a special construction of looper and in the partlculai" means for imparting thevarious movements thereto, as hereinafter described and referred to in the appended claims.

rl`he invention is illustrated in the accoinpanying drawings, in which- Figure 1 represents s front elevation of so much of a sewing machine as is necessary to lroiit, rear and sectional views ofmy special form of loo er.

Inthese rawings, A represents the standard. of the machine; B the work support, which is provided witha throat plate having :nV-shaped ridge or projectionC,v over which the goods tobe sewed are crimped; D repre- '1.0 sents the. overhangingfarm or goose-neck; and E as a whole the head of the machine. These parts, together with the transverse driving shaft E, are substantially of the construction shown in the second application above referred to, and as they form no par-= v ticnlar part of this invention,"need not be more specifically referred to. f

To vthe rear side of the belt wheel F is attached a crank pin 1,-upon which is pivoted 80 one end of the pitman rod 2, which, at its opposite end embraces aball stud 4, upon the crank 5, fixed tothe i'ock shaft 6, joui'- l naled iii the bearing barrel 7 on the head of the machine. Upon the opposite side of this bearing barrel, and upon the rock shaft is lixed another crank 9, to which -is pivotally secured a forked pin or bolt 10, Between the forks of this pin or bolt 1() is pivotally secured the upper end vof the looper supporting rod 1l, which may be in one piece, or which, as herein shown, comprises t 1e ji per part/12 pivoted between the forks, an' the ower part 13,' screwed into a socketiin the upper part. f. he shank of the looper 14 is securedin a" coller or clamp 15 on the lower end of they rod 13. This rod 13, through the actio of the cranks 5 and 9, is raisedfand lowered to ,f

impart tothe looper a rise andiall, to enablef'lw it to pass froinone side the-lineofthe seam to f the other, over the apex or: ridge on the throat. plate, and to enable it 'to escape' obstructions such as seams or extra. thicknesses of goods; butl to im art this sidewise move- 1,05 ment from one side t e line of the seam to the othei, it is necessary to freely pivot or ful-` crum the-looper supporting rod, in order that as it rises and falls and the cranks ass from one side the. center to the other, t e tilting 'under the'looper. Fig. 7 shows the looper in l'looper thread.

gagc'dj thelooper v`thread and the looper vfthreadbeing 'brought into position by thev projection" onjthe under side of the looper.

Vneedle loop, and also to carry its own loop eccentric 24, upon the main shaft.

vided with a recess on its under side, as

Athe needle engages the looper thread, the said movement may be imparted, and to this end I have provided the arm 16, enlarged at its outer end and formed with a` recess through which the rod 13 passes, this recess being formed to receive and hold a ball bearing 17. In the rise and fall, therefore, of said looper sup orting rod, it slides through the ball 17, an at the same time oseillates said ball in its support, whereby the looper has the four motions above referred to. It is also necessary to impart to said looper a forward and backward moveirfent-in the direction of its length to enable it to take and leave the into position to be engaged by the needle, and to this end the arm 16 ht its inner end is fixed upon an upright rock shaft 18, journaled in bearing lugs 19 and 20 on the achine frame. The upper end of this shaft 18 has clamped about it one end of a rod or bar 21, which at its opposite end has a ball and pitman connection 22, 28, with an As the shaft revolves, therefore, the vertical rock shaft is oscillated, and the bearing through which the looper rod passes, and in which it is fulcrumed swings from front to rear of the machine, thus imparting to the looper a backward and forward `movement in the direction of its length. ,'jl l,

As a further and special improvement in a machine of this character, I have provided a special construction of looper, shown in detail in Figs. 11 to 12.` 'lhis looper is proshown at 25, the rear shoulder of this recess forming a projection 26, which, in the movement of the loopery engages the thread and holds it in position, so that the needle will pass between the under side of the looper and the looper thread. In other words, thelooper carries on its under side a spreader for its own loop, which spreader acts as shown in Figs. A5 to'l() ol' the drawings, Fig. 5 showing the loo er just entering the needle loop, Fig. 6, the ooper about one-half wa over to the other side ofthe scam, with the ooper thread position preparatory to moving back, before looper thread having been engaged by the projection upon the under side of said looper. In Fig. 8, the looper is show'n as having moved back from the osition shown in Fig. 7, with vthe point of t e needle just passing under the looper preparatory to engaging thev Fig. 9 illustrates a cross sectionv of" the looper, the pointbeing cut away, but the looper thread shown in full lines, in this'sketehthe point ofthe needle having en- Fig. l() represents the looper passing back o'ver the goods, back to the path of the needle i l4. In a sewin to position preparatory to again entering the l needle loop.

Having thus described my invention, what I claim as new, and desire to secure by Iietters looper support, a bodily vertical movement,

a swinging movement on its pivot, and a bodily horizontal movement, whereby the looper is carried bodily vertically, bodily sidewise, and bodily in the direction of its length substantially as ldescribed.

2. In a sewing machine having a suit'able work support, suitable stitch-forming mechanism including a looper, a vertically arranged rod or bar, to the lower' end of which said looper is rigidly secured,v a universal joint support for said looper rod interir'iediate its ends, and connections at the upper end ofsaid looper supporting rod for operating it, te carry the looper bodily vertically, in a sidewise direction and in the direction of its length, said connections including a pivotal suspension for the upper end of said bar or rod; substantially as described.

3. In a sewing machine, stitch-forming mechanism including a looper fulcrumed upon a universal bearing, means for imparting to said looper, a bodily sidewise movement, a. vertical movement, and a bodily movementy in the direction of its length, said means including a universal pivot for said looper separate from the universal bearing substantially as described;

machine, stitch-forming mechanism inclu ing a thread-carrying needle and a loopei fulcrumed upon a universal bearing, means for imparting to said looper, a bodily sidewise movement, a vertical movement and a bodily movement to take and leave the needle loo said ineans including' a universal pivot for said looper se arate from the universal bearing, and inc uding also means for positively swinging the bearing bodily substantially as described.

5. In a sewing machine, a looper arranged and operating entirely above the work support, in combination with a needle reciprocating across the line of the scain also operating above the work support, said looper being mounted upon a universal joint, upon which it rocks as it rises and falls with means also for positively swinging said universal joint bodily, whereby thc looper is also swijn bodily substantially as described.

6. n a sewing machine, stitch-forming mechanism including a ,loopen a support therefor, a crank from which the support is ivotally suspended, and a universal bearing in which the supporting rod is fulcruined and ,for positively Swingin the bearing-bodily?,

substantially as des-cri ed.

7. In a sewing machine, a looper, a'so porting rod therefor, means for operating .t e

same,.1nc1uding a crank from'wliieh the eupf portingfrod is pivotallysuspended, its pivotal axis being transverse to the axis of oscillation f the crank, a universal bearing in which the supporting rod is fulcrurncd, and means for bodily swinging the bearing; sub stantiallX as described. l,

S In 'a blind stitch sewing machine, in combinationfwith a needle varranged above the 'work support and reciprocating across the line of seam, va looper mounted upon'a vertical rod'pivotally, suspended at its upper end from a crank arm, Witlrmeans for opern ating said crank erm, a universal bearing in which said rodtis ulcrumed, and with respect to whichit is vertically movable,'and means for swinging said universal bearing bodily; substantially as described.

Q .ln a blind stitch 'sewing machine, in combination with a needle arranged above the work support and reciprocating across the line of seam, a'loopermounted upon a vertical rod pivotallyjsuspended at its upper end Vfrom a crank arni, with means for oper- .ating said crank arm, a universal bearing in which said rod is fulcrumed, and with reepeotto which it is vertically movable, a

`swinging 'arm in which said universal bearing 'fis mounted,v and means for swinging said arm; substantially as described.

10,/111 a sewing machine stitcli-fo11ning mechanism including a looper mounted upon a. swinging universallyY pivoted suoport, a rocking crank frame for raising and lowering and swinging said su port, a rocking` arm suliorting a universaypivot through which :sali rod passes and is fulcrumed, and meansfor rocking said arm; substantially as described. l

. eeaeei ll. ln a sewing machine, a looper. au operating mechanism therefor including universally pivoted rod, upon which the looper is supported, afroclr sliaift carrying a crank uponwliich one end oi said rod is pivoted to swing in two directions, a crank upon the opposite end ci said roel; shalt, andA connections between the latter and the driving shaft; substantially described.

l2. ln a sewing machine, in combination with a reciprocating needle, and a loopen with means for causing it 'to engage the needle loop, and then carryY a thread into position to be engaged b v the needle in its next reciprocation, said leonor bein-g provided with projection on ite under side in rear ol the position of tbe needle n" n. vengaging the louper threadand adapted to engage the looper thread after the looper passes through. 'the y:needle loop on way to the position, when the needle enters the looper oop; substantially deecribed.

1?. ln a sewing machine, the combination of a reciprocating needle, a looper with means for causing it to engage the needle loop and then carry a thread into position to be en gaged b v the needle in its nent reciprociv tion, said looper being' provided with a im jection on under side in rear ci" the Josition oi the needle when engaging uooper thread and adapted to engage the looper thread alter the locpcr thro gli the needle loop on its way 'to tile posit on IefliereV the needle enters the looper loop,

said loopcrhaving also recess on its 'onder eide in advance of the projection to e-iford a clearance way lor the needle; substantially as described.

"Inv testimony whereof l ailier my signature,

in presence of two witnesses.

Witnesses:

W. H. MEYER, W. E. WEAVER.

il G 

